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add a generator to pull rc-local.service in
rc-local.service acts as an ordering barrier even if its condition is false, because conditions are evaluated when the service is about to be started. To avoid the ordering barrier in a legacy-free system, add a generator to pull rc-local.service into the transaction only if the script is executable. If/when we rewrite SysV compatibility into a generator, this one can become a part of it.
This commit is contained in:
Michal Schmidt
parent
42e87475cf
commit
1567308317
29
Makefile.am
29
Makefile.am
@ -529,6 +529,8 @@ dist_systemunit_DATA += \
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units/fedora/prefdm.service \
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units/fedora/rc-local.service \
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units/fedora/halt-local.service
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systemgenerator_PROGRAMS += \
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systemd-rc-local-generator
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endif
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if TARGET_MANDRIVA
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@ -536,6 +538,8 @@ dist_systemunit_DATA += \
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units/mandriva/prefdm.service \
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units/fedora/rc-local.service \
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units/fedora/halt-local.service
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systemgenerator_PROGRAMS += \
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systemd-rc-local-generator
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endif
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if TARGET_FRUGALWARE
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@ -547,6 +551,8 @@ if TARGET_SUSE
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dist_systemunit_DATA += \
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units/suse/rc-local.service \
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units/suse/halt-local.service
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systemgenerator_PROGRAMS += \
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systemd-rc-local-generator
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endif
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if TARGET_MAGEIA
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@ -554,6 +560,8 @@ dist_systemunit_DATA += \
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units/mageia/prefdm.service \
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units/fedora/rc-local.service \
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units/fedora/halt-local.service
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systemgenerator_PROGRAMS += \
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systemd-rc-local-generator
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endif
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if HAVE_PLYMOUTH
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@ -1270,6 +1278,15 @@ systemd_getty_generator_CFLAGS = \
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systemd_getty_generator_LDADD = \
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libsystemd-basic.la
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systemd_rc_local_generator_SOURCES = \
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src/rc-local-generator.c
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systemd_rc_local_generator_CFLAGS = \
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$(AM_CFLAGS)
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systemd_rc_local_generator_LDADD = \
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libsystemd-basic.la
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systemd_user_sessions_SOURCES = \
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src/user-sessions.c \
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src/cgroup-util.c
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@ -1963,9 +1980,6 @@ endif
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if TARGET_FEDORA
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$(MKDIR_P) -m 0755 $(DESTDIR)$(systemunitdir)/final.target.wants
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( cd $(DESTDIR)$(systemunitdir)/multi-user.target.wants && \
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rm -f rc-local.service && \
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$(LN_S) $(systemunitdir)/rc-local.service rc-local.service )
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( cd $(DESTDIR)$(systemunitdir)/final.target.wants && \
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rm -f halt-local.service && \
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$(LN_S) $(systemunitdir)/halt-local.service halt-local.service )
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@ -1980,9 +1994,6 @@ endif
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if TARGET_MANDRIVA
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$(MKDIR_P) -m 0755 $(DESTDIR)$(systemunitdir)/final.target.wants
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( cd $(DESTDIR)$(systemunitdir)/multi-user.target.wants && \
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rm -f rc-local.service && \
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$(LN_S) $(systemunitdir)/rc-local.service rc-local.service )
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( cd $(DESTDIR)$(systemunitdir)/final.target.wants && \
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rm -f halt-local.service && \
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$(LN_S) $(systemunitdir)/halt-local.service halt-local.service )
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@ -2004,9 +2015,6 @@ endif
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if TARGET_SUSE
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$(MKDIR_P) -m 0755 $(DESTDIR)$(systemunitdir)/final.target.wants
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( cd $(DESTDIR)$(systemunitdir)/multi-user.target.wants && \
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rm -f rc-local.service && \
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$(LN_S) $(systemunitdir)/rc-local.service rc-local.service )
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( cd $(DESTDIR)$(systemunitdir) && \
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rm -f local.service && \
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$(LN_S) rc-local.service local.service )
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@ -2017,9 +2025,6 @@ endif
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if TARGET_MAGEIA
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$(MKDIR_P) -m 0755 $(DESTDIR)$(systemunitdir)/final.target.wants
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( cd $(DESTDIR)$(systemunitdir)/multi-user.target.wants && \
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rm -f rc-local.service && \
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$(LN_S) $(systemunitdir)/rc-local.service rc-local.service )
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( cd $(DESTDIR)$(systemunitdir)/final.target.wants && \
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rm -f halt-local.service && \
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$(LN_S) $(systemunitdir)/halt-local.service halt-local.service )
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107
src/rc-local-generator.c
Normal file
107
src/rc-local-generator.c
Normal file
@ -0,0 +1,107 @@
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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Copyright 2011 Michal Schmidt
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "log.h"
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#include "util.h"
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#if defined(TARGET_FEDORA) || defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
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#define SCRIPT_PATH "/etc/rc.d/rc.local"
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#elif defined(TARGET_SUSE)
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#define SCRIPT_PATH "/etc/init.d/boot.local"
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#endif
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const char *arg_dest = "/tmp";
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static int add_symlink(const char *service) {
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char *from = NULL, *to = NULL;
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int r;
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assert(service);
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asprintf(&from, SYSTEM_DATA_UNIT_PATH "/%s", service);
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asprintf(&to, "%s/multi-user.target.wants/%s", arg_dest, service);
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if (!from || !to) {
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log_error("Out of memory");
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r = -ENOMEM;
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goto finish;
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}
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mkdir_parents(to, 0755);
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r = symlink(from, to);
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if (r < 0) {
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if (errno == EEXIST)
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r = 0;
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else {
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log_error("Failed to create symlink from %s to %s: %m", from, to);
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r = -errno;
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}
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}
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finish:
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free(from);
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free(to);
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return r;
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}
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static bool file_is_executable(const char *f) {
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struct stat st;
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if (stat(f, &st) < 0)
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return false;
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return S_ISREG(st.st_mode) && (st.st_mode & 0111);
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}
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int main(int argc, char *argv[]) {
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int r = EXIT_SUCCESS;
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if (argc > 2) {
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log_error("This program takes one or no arguments.");
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return EXIT_FAILURE;
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}
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log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
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log_parse_environment();
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log_open();
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if (argc > 1)
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arg_dest = argv[1];
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if (file_is_executable(SCRIPT_PATH)) {
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log_debug("Automatically adding rc-local.service.");
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if (add_symlink("rc-local.service") < 0)
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r = EXIT_FAILURE;
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}
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return r;
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}
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@ -5,8 +5,10 @@
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This unit gets pulled automatically into multi-user.target by
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# systemd-rc-local-generator if /etc/rc.d/rc.local is executable.
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[Unit]
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Description=/etc/rc.local Compatibility
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Description=/etc/rc.d/rc.local Compatibility
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ConditionFileIsExecutable=/etc/rc.d/rc.local
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[Service]
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@ -5,6 +5,8 @@
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This unit gets pulled automatically into multi-user.target by
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# systemd-rc-local-generator if /etc/init.d/boot.local is executable.
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[Unit]
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Description=/etc/init.d/boot.local Compatibility
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ConditionFileIsExecutable=/etc/init.d/boot.local
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